The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 22, 2000
Filed:
Dec. 03, 1996
Applicant:
Inventors:
Wayne Allan Malkin, Edmonton, CA;
Charles David Perman, Edmonton, CA;
Assignee:
Shana Corporation, Alberta, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04K / ;
U.S. Cl.
CPC ...
380 25 ; 380-3 ; 380 18 ;
Abstract
Techniques for ensuring the security of forms data are disclosed. The layout for a particular form is signed separately from the data used to fill out the form using encryption techniques. The signed data is related to the signed layout in a way which permits the layout to be changed without requiring the data to be changed while still guaranteeing that a changed layout does not change the original meaning of the signed data.